FIG 24 TROUBLESHOOTING CHART – continued
PROBLEM CAUSE CORRECTION
Firing Rate Too Low Use Higher Input Nozzle
Dirty Heat Exchanger Clean Heat Exchanger
Poor Combustion Adjust Using Instruments
Undersized Capacity Size Based on Heat Loss
Distribution System Ensure Proper Design
Not Enough Heat
Faulty Thermostat or Location Repair, Replace, or Relocate
Defective Primary Control Repair or Replace
Faulty Thermostat or Location Repair, Replace, or Relocate
Faulty Oil Pump Check for Proper Pressure
Firing Rate Too High Reduce Nozzle Size
Oversized Capacity Size Based on Heat Loss
Too Much Heat
Distribution System Proper Duct Design
Poor Combustion Adjust Using Instruments
Excess Air Adjust Air Setting
Inadequate Flue Draft Provide Specified Draft
Insufficient Combustion Air Provide Combustion Air
Oil Supply Check Oil Supply
Electrode Setting Adjust Electrodes
Wrong Nozzle Use Specified Nozzle
Fuel System Leaking Check Fuel System
Excessive Oil Consumption
Faulty Oil Pump Repair or Replace Pump
Over-Firing Use Specified Nozzle Size
Replace Dirty Filters
Increase Blower Speed
Increase Undersized R/A Ducts
Clear Blocked Return Registers
Increase Undersized S/A Ducts
Clear Blocked Supply Grills
Replace Faulty Blower Motor
Clean Clogged Blower Wheel
Tripping High Limit
Replace Broken Blower Belt
Faulty Thermostat or Location Repair, Replace, or Relocate
Heat Anticipator Set Too Low Adjust Heat Anticipator
Short Cycle
Defective Primary Relay Repair or Replace Relay
Burner Pump Whine Eliminate Suction Line Air Leak
Duct Expansion Stiffen Plenum & Ducts
Noise
Plenum Amplifies Noise Install Plenum Apron
Blocked Flue Passages Clean Boiler
Unspecified Burner Replace Burner
Unspecified Nozzle Install Correct Nozzle
Incorrect Head Install Correct Head
Wrong/Misaligned Static Plate Install Correct Plate or Align
Chimney Down Drafting Install Chimney Cap
Increase Draft at Breech
Poor Over-Fire Draft
Correct Chimney Problems
Use Specified Nozzle
Over-Firing
Use Specified Pressure
Use Correct Air Tube Assembly
Burner Air Tube Burn-Off
Incorrect Insertion
Adjust Flange
Reduced Draft Add Combustion Air
Delayed Ignition Adjust Burner Settings
Loss of Prime Eliminate Teed Oil Lines
Unspecified Burner Replace Burner
Unspecified Nozzle Install Correct Nozzle
Frequent Sooting
Incorrect Head Install Correct Head
Reduce Motor Speed
Premature Corrosion Temperature Rise Too Low
Use Higher Specified Nozzle
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